Manufacture of boxes



Dec. 14, 1937.

A. G. A. VAN DEN BOGAERT MANUFACTURE OF BOXES Filed June 27, 1935 r 63.79. afzm Wv W;

Patented Dec. 14, 1937 mnurnoronn F noxns Alexander Gerard Anton yan den Bogaert, Surblto Enrland, assignor to No-Nail Cases Pro prietary Limited, London, England, a limited liability company of Victoria, Australia Application June :1, 1935. Serial No. 28,755 In Great Britain July 3, 1934 1' Claim,

, This invention relates to improvements in the manufacture of boxes of the type in which there is first formed, in the flat, a blank which is capo-- ble of being folded up into bottom. two opposite sides, and possibly the top of the box, and to which, when folded up, two end pieces are added to complete the box.

In the formation of blanks for boxes of this type it has been customary to employ three or four rectangular pieces of 3-ply wood or other suitable material, for forming the bottom, two oposite sides and possibly the top of the box, and to unite these separate pieces into a folding blank by means of strips of metal of angle section ailixed on opposite sides of the blank. Such a box, and a suitable strip for the production thereof are described for example in the sp'ecifl cation of Letters Patent of the United States No.

According to the present invention a ioldable blank for the production of boxes of this type is produced by taking a single sheet oi ioldable material, such as cardboard or millboard, and creasing it transversely into three or four parts correspondingto the bottom, opposite sides and possibly the top of the box, and aillxing to opposite sides (usually the long sides) or this blank strips of metal of angle section similar for example to those described in the above-numbered United States patent specification. The flanges of the metal strips are provided with notches at points which register with the transverse creases in the cardboard blank, so that the whole can be folded up, when required, into box form.

It The strips are aflixed to the blank with a space left between the flanges of the strips and the edges oi the blank, in the manner also described in the above-numbered United States patent specification, so that grooves or channels are provided into which the end portions of the box, for example rectangles of 3-ply may be inserted.

The present invention is illustrated in the accompanying drawing, in which- Fig, 1 shows the box blank in the flat,

Fig. 2 shows the blank bent up to box form, with one end piece partly inserted,

Fig. 3 shows the box completed and closed,

Fig. 4 illustrates a detail on an enlarged scale, and

Pig. 5 illustrates a further modification of the invention. 1

A rectangular sheet A of millboard is creased transversely at B, B, so that the sheet can readily be folded or bent up to form the bottom A, oppcrite side's A A and top H of a box, as shown in Fig. 2. Along the edges of the sheet are fixed toothed strips C, C of metal, having flanges C (3 spaced from the edges of the sheet A, to form in known manner a groove at each side of the box blank for the reception, when the blank is 5 folded, of the end pieces, of which one, partially inserted, is indicated at D. The end pieces may with advantage be made of 3-p1y wood. The flanges of the metal strips are notched in known manner opposite to the creases B, B, to permit 10 of the strips being bent; and the strips are attached to the sheet A by means of the teeth 01' the strip which are passed through the sheet A and are bent over.

The end piecesD are, as'shown, provided with 5 lugs D D which engage behind the edges of the upright sides A A in known manner to hold the sides in position when the box is being filled. To enable the lugs D to pass behind the, rear side member A of the box, notches B are made 20 in the edges of the cardboard sheet A, at the ends of the crease B between the parts A and A. These notches B uncover the body portion C oi the metal strips at these points.

,separate from the remainder, the blank will consists of the parts A A and A only: and the lid part A may be furnished with a flap A at each side for attachment as before.

In order to give additional depth to the grooves at the side of the blank for the reception of the end pieces of the box, strips F of millboard or other material may be laid along the edges of each portion A A, etc., of the blank (see Fig. 4) 40 and flxed thereto by the teeth of the metal strips. The strips F may be temporarily assembled upon the blanks before the metal strips are attached thereto, e. g., by wire stapling, or by an adhesive.

The additional depth of the grooves hereby pro- F of millboard or the like inset from the edge of the sheet. The blank A is here in effect provided with a shoulder along its edges.

A great advantage afforded by the present invention as compared with the manufacture of boxes with the blank made up of separate portions for bottom, sides, etc., is;that comparatively cheap material, e. g. millboard may be used in place of the 3-ply or other wood panels hitherto used wiihout, however, sacrificing more than a small proportion of the strength of the box. Although the boxes, made by the known process, with separate pieces constituting bottom, sides and top of the box, are surprisingly strong for their weight, nevertheless they may, under great stresses, open or gape along the lines where adjoining pieces meet, whereas with the box blank according to the present invention the portions of the blank forming the sides, bottom and top are all united and any tendency to gape at the corners under end pressure is resisted. The preferred method of closure above described joins the ends of the folded blank to one another, thus completing the strengthening of the box.

Although I have described and illustrated a metal strip which is attached to the foldable blank by means of a number of teeth formed in the strip itself, my invention is not confined to the use of metal strips of this kind. With a blank of millboard the metal strip may be affixed by means of rivets for example.

I claim:

A box comprising end members, a body member in a continuous sheet creased transversely so that it will readily fold into a bottom, two sides and a top, continuous metallic reenforcing strips each having a body portion provided with teeth and a fiat border flange extending at right angles to the body portion of said strips and on the same side thereof as the teeth, said strips being fixed to the outer surface of the longitudinal edges of said body member with their flanges opposite and spaced from such edges, the teeth of said metal reenforcing strips extending through the longitudinal edge portions of said body member, the edges of said body member cooperating with the inner surface of said flanges of the metal reenforcing strips to form continuous channels to receive the respective end members, the said body member being slotted at each edge on the line where the top portion of the body member adjoins the remainder of the body member, and said end members being provided with inturned lugs adapted to engage behind the edges of the side portions of said body member when the said end members are inserted in said continuous channels.

ALEXANDER GERARD ANTON VAN DEN BOGAERT; 

